Lock switch devices



Aug. 25, 1970 P. M. HAwKlNs 3,525,830

LOCK SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 3 1 y 'IIIV/All@ 25, 1970v P. M. HAwKnNs 3,525,830

LOCK SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 4 T :1l-E. 204 ywww.Hmwwanuf I N VEN TOR.

Aug- 255- 1970 P. M. HAWKINS 3,525,830

LOCK SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 5 AUS- 25, 1970P. M. HAWKINS 3,525,830

Loox SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 6 F. M. HAWKINSLOCK SWITCH DEVICES Aug. 25, 1970 8 Sheets-Sheet '7 Filed March 14, 1967C BY Aug. 25, 1970 P. M. HAW'KINS 3,525,830

i LOCK SWITCH DEvCEs Filed March 14, 1967 v 8 Sheets-Sheet 8 UnitedStates Patent O U.S. Cl. 200-44 17 Claims ABSTRACT F THE DISCLOSUREIntegrated locks and switches, the locks having sliding bolts whichlatch into projected position; the switches being arranged to operate:when either the lock casing is forced or when a special strike-switchassemb-ly is forced.

This is a continuation-impart of a copending application Ser. No.568,546, filed July 28, 1966.

This invention relates to lock-switch arrangements of the type whichrespond to jimmying or prying forces to signal an attempted unauthorizedintrusion.

The general idea of a combination lock and switch to produce a signal inresponse to jimmying forces has long been known. In the past however,the actual use of such devices has been quite limited. This in part wasdue to the considerable expense and complexity of these devices. Perhapseven more important however, was the fact that special rather Lmajorstructural changes had to be made to the room or other area beingprotected. Special mortices had to be formed in doors, windows and theirframes to accommodate the locking arrangements.

The present invention eliminates the diflculties associated with theconstruction and installation of lockswitches. Moreover, it permitssimple and convenient surface mounted installations and yet maintains afull degree of protection to the closure.

According to one aspect of the present invention, there is provided alock switch arrangement comprising a bolt `housing mounted for limitedmovement with respect to an anchor plate. The anchor plate is secured,as by screws, to the surface of a door, window or to the surroundingframe. When the bolt housing is in place on the anchor plate, it coversthe mounting screws. A switch is arranged in conjunction with the anchorplate and bolt housing to be actuated Whenever any forcible attempt ismade to lift the housing and expose the anchor screws. 'Ihis switch ofcourse also becomes actuated by any attempt to forcibly open the door orwindow on which the lock-switch arrangement is mounted. As will ybedescribed more fully hereinafter, one embodiment of the presentinvention comprises a self contained unit which utilizes novel switchingmeans to initiate a locally generated acoustical alarm.

According to another aspect of the invention, there is provided a novelstrike-switch arrangement which responds to prying or jimmying forcesapplied thereto through the lock bolt. This novel strike switch isrugged and reliable and yet it is of compact and economicalconstruction, and is suitable for mounting in a window or door framewithout major structural modification thereof. This novel strike-switchcomprises a guide-block, slideblock arrangement with the slide-blockarranged to slide in a groove or channel along the guide-block. Aspecial housing arrangement is provided for the guide block as isspecial spring means to bias the slide-block to one end of the channel.A switch is mounted on the back of the guide block, and this switch isconnected as through a slot in the guide block to be operated bymovements of the slide block.

There has thus been outlined rather broadly the more important featuresof the invention in order that the detailed description thereof thatfollows may be better understood, and in order that the presentcontribution to the art may be better appreciated. There are, of course,additional features of the invention that will be described hereinafterand which will form the subject of the claims appended hereto. Thoseskilled in the art will appreciate that the conception upon which thisdisclosure is based may readily be utilized as a basis for the designingof other structures for carrying out the several purposes of theinvention. It is important, therefore, that the claims be regarded asincluding such equivalent constructions as do not depart from the spiritand scope of the invention.

Specic embodiments of the invention have been chosen for purposes ofillustration and description, and are shown in the accompanying drawingsforming a part of the specification, wherein:

FIG. 1 is a front elevational view illustrating a window arrangementincorporating one embodiment of the present invention;

FIG. 2 is an enlarged fragmentary perspective View illustrating themounting of the embodiment of FIG. 1;

FIG. 3 is a perspective View, partially broken away, of the block andswitch portions of the arrangement of FIG. l;

FIG. 4 is an enlarged fragmentary perspective view, partially brokenaway, showing the internal configuration of the lock-switch arrangementof FIG. 1;

FIG. 5 is an enlarged section view taken along line 5-5 of FIG. 1;

FIG. 6 is an exploded view of the lock and switch portions of thearrangement of FIG. 1;

FIG. 7 is a section view taken along line 77 of FIG. 2;

FIG. 8 is section view similar to FIG. 7 but showing the lock and switcharrangement in protracted or locking condition;

FIG. 9 is a perspective view illustrating a lock and alarm arrangementforming a second embodiment of the present invention:

FIG. 10 is a view taken along line 10-10 of FIG. 9;

FIG. 11 is a view taken along line 11-11 of FIG. 9;

FIG. 12 is a View similar to FIG. 11 but showing the device in forced oralarm actuating condition;

FIG. 13 is a section view taken along line 13-13 of FIG. 9;

FIG. 14 is a View similar to FIG. 13 showing the device in its triggeredcondition;

FIG. 15 is a view taken along line 15--15 of FIG. 13;

FIG. 16 is a view taken along line 16-16 of FIG. 14;

FIG. 17 is a partially exploded View of the embodiment of FIG. 9;

FIG. 18 is a fully exploded view of the embodiment of FIG. 9;

FIG. 19 is a perspective view of a window arrangement sho-wing a furtherembodiment of the present invention;

FIG. 20 is a partially exploded view of the embodiment shown in FIG. 19;

FIG. 21 is a section view taken along line 21-21 of FIG. 19,

FIG. 22 is an exploded view of a portion of the embodiment of FIG. 19;

FIG. 23 is a section View taken along line 23-23 of FIG. 2l;

FIG. 24 is a perspective view showing a still further embodiment of thepresent invention; and

FIG. 25 is an exploded view showing the internal configuration of theembodiment of FIG. 24.

FIG. 1 illustrates a window installation arrangement incorporating oneembodiment of the present invention. As shown in FIG. 1, a lock-switchstructure, depicted generally at 30, is arranged to lock a lower sash 32of a window arrangement 34. The lock-switch 30 is secured to a windowframe 36 in which the lower sash 32 slides. In the particulararrangement shown, the lock-switch 30 is also positioned at a locationwhere the lower sash 32 and an upper sash 38 overlap when the two sashesare in their fully closed positions as illustrated in FIG. 1.

FIG. 2 shows in greater detail the general construction of thelock-switch arrangement 30. As shown in FIG. 2, the device is made up ofan anchor member 40 which is secured to the window frame 36, and a bolthousing 42, which is nested in a corner recess in the anchor member 40.The housing 42 and the anchor member 40 as shown, are dimensioned sothat when they are nested together, their outer surfaces are contiguousso as to provide the appearance of `a single compact block.

The housing 42 has a plug bore 44 extending therethrough in a directiontransverse to the direction of movement of the lower sash 32. Thus,while the lower sash 32 moves up and down in a vertical direction, thebore extending through the housing 42 extends in a horizontal directiontoward and away from the lower sash 32. A cylindrical plug 46 is closelyfitted into the plug bore 44 of the housing 42. Additionally, there isprovided a key operated lock cylinder 48 which extends into the plug 46and which has a key slot 50 exposed at the front surface of the plug 46.

Turning now to FIG. 3, it will be seen that the anchor member 40 is madeup of a relatively thin ange portion 50 and a thicker switch housingportion 52 which extends out from the ange portion. The flange portion50 iS provided with several mounting holes 54 through which screws orbolts may pass to secure the anchor member 40 against the windo-w frame36. It will be noted that the holes 54 are completely covered by thebolt housing 42 when the device is fully assembled.

The switch housing portion 52 of the anchor member 40 is provided with arecess 56 which opens out onto the surface coinciding with the outerface of the flange portion 50. An electrical switch 58 is set inside therecess 56. The switch 58 includes an actuation button 60 and a flexibleleaf-spring switch arm 62 which extends over the button 60. This switcharm 62 is normally in an upward position up off from the button 60; butit is held down against the button 60 by the action of the bolt housing42 when the bolt housing is in its normal or unactuated position asshown in FIGS. 2 and 3. Also as shown in FIG. 3, a smaller diameteropening 64 is provided in the end of the bolt housing 42 which faces thewindow sash 32, in order to permit projection of a locking bolt as willbe explained more fully hereinafter.

As shown in the cutaway view of FIG. 4, the anchor member 40 is mountedso that its anged portion 50 lies flat against the window frame 36 in aposition adjacent to the front surface of the window sash 32. In thismounting arrangement, the switch recess 56 is covered by the windowframe 36. At the same time, the mounting bolt openings 54 are covered bythe bolt housing 42. Thus neither the switch nor the mounting bolts areaccessible to tampering.

As further shown in FIG. 4, the plug bore 44 in the bolt housing 42opens out onto the front end of the housing 42. The bore 44 extendsthrough the housing to a location close to, but not all the way to theopposite end of the housing, thereby leaving an end wall 66 at theopposite end of the housing. The bolt opening 64 passes through the endwall 66 thereby communicating with the plug bore 44.

It will be noted that the plug 46 which ts closely within the plug bore44 is considerably shorter in length than the bore 44 and therefore canmove reciprocally back and forth within the bore. A cylindrical lockingbolt 68 is integrally attached to the inner end of the plug 46 andextends from the plug 46 in alignment with the bolt opening 64. Thuswhen the plug 46 moves back and forth 4 along the plug bore 46 thelocking bolt 68 projects from and retracts into the bore 64. As will bedescribed more fully hereinafter, means are provided for securing theplug 46 in its inward position as shown. This hold the bolt 68 inprotracted position extending out from the housing 42 and into the lowersash 32.

The lower sash 32 is provided with a bolt receiving arrangementcomprising a tubular bolt receiving housing 70. This bolt receivinghousing is of tubular conguration and has an internal diameterdimensioned to accommodate the bolt 68 in close sliding relationshipwhen the bolt is projected as illustrated in FIG. 4. It will thus beseen that when the bolt 68 is projected, the lower sash 32 cannot bemoved upwardly because it is held through the action of the bolt 68, theplug 46, the bolt housing 42 and the anchor member 40 to the windowframe 36.

The present arrangement, as illustrated in FIG. 4, is further adapted toprovide automatic locking for the upper window sash 38 at the same timethat the lower window sash 32 is locked in place. To this end, the lowerwindow sash 32 is provided with the bore 72 which extends completelytherethrough. The tubular bolt receiving housing 70 extends completelythrough the bore 72 and opens out onto the opposite face of the windowsash 32. Within the housing 70 there is provided an additional springbiased bolt member 74 which is normally maintained completely within itshousing 70. However, whenever the bolt 68 is projected into the housing70, it displaces the bolt 74 causing it to project out toward the upperwindow sash 38. The upper window sash 38 is likewise provided with itsown bolt receiving housing 76 in alignment with the bolt 74 when theupper and lower sashes are in their fully closed positions. Thus, whenthe key operated locking bolt 58 is projected into the housing 70 tolock the lower sash 32 into closed position, this action also causesprojection of the bolt 74 from the lower shaft 32 into the boltreceiving housing 76 in the upper sash 38, thereby also locking thatsash in closed position.

The construction of the bolt receiving housing 72 in the lower sash 32is best illustrated in FIG. 5. As there shown, the bolt 74 is providedwith a larger diameter portion 78 in the region thereof closest to thelock-switch device 30. It is this larger diameter portion 78 which iscontacted by the locking bolt 68 of the lock-switch device 30.

The housing 70 itself is provided with the longitudinal slot in theregion of the enlarged portion 78; and a small guide screw 82 isthreaded through the slot 80 and into the larger diameter portion 78 ofthe bolt 74 so that its head projects into the slot 80. The screw 82allows the bolt 74 to move back and forth over a distance correspondingto the length of the slot 80. A bias spring 84 surrounds the bolt 74between its larger diameter portion 78 and a wall 85 at the inner end ofthe housing 70. The spring 84 normally holds the bolt 74 in a retractedposition as shown in FIG. 5. Thereafter, when the bolt 68 from thelock-switch assembly 30 is projected into the housing 70, it engages thelarger diameter portion 78 of the bolt 74 and moves it to the left asshown in FIG, 5. This causes the bolt 74 to project into the housing 76of the lower sash 38 thereby locking the upper and lower sashes 38 and32 together, while the lower sash 32 is locked via the lock-switchassembly 30 the window frame 36.

As illustrated in FIG. 5, the bolt housing 42 itself is provided withthe longitudinal slot which extends from the plug bore 44 out onto thesurface which rests against the ange portion 50 of the anchor member 40.A small guide screw 92 passes through the slot 90 and is threaded intothe plug 46. The head of the guide screw 92 thus moves back and forthalong the slot 90 as the plug 46 moves back and forth within its bore44. It will be appreciated that the guide screw 92 thus limits theamount of longitudinal movement which the plug 46 may undergo within thehousing 42. The position and length of the slot 90 are set so that theplug 46 may more from a first position with its outer surface flush withthe outer surface with the housing 42 and the bolt 68 fully retracted,as shown in FIG. 2, and a second position, with the plug 46 lying wellwithin the housing 42 and its locking bolt 68 fully projected into thehousing 70 of the lower sash 32 as illustrated in FIG. 4.

As shown in the exploded View of FIG. 6, the bolt housing 42 is providedwith a lug 94 which fits into a recess 96 in the switch housing portionS2 of the anchor member 40. A threaded force adjustment bolt 98 passesup through the center of the recess 96 and is threadedly engaged intothe lug 94 of the bolt housing 42 to hold it in place on the anchormember 40. Also, as shown in FIG. 6 the resilient leaf spring switch arm62 passes up through the upper surface of the portion 52 and engages thehousing 42 in a guide recess 100 provided therefor. When the housing 42is flat against the upper surface of the switch housing portion 52, thesurface of the recess 100 presses downwardly against the switch arm 62.However, if the housing 42 is lifted upwardly off from the surface ofthe switch housing portion 52, such movement will allow the switch arm62 to move upwardly, thus actuating the switch 58.

Turning now to FIG. 7. It will be seen that the switch housing portion52 of the anchor member 40- is provided with a counterbore 102 inalignment with and extending to a location close to the lower end of therecess 96. The counterbore 102 and the recess 96 communicate with eachother via a bolt accommodating opening 104 through which the bolt forceadjustment 98 passes. A force responsive spring 106 surrounds the forceadjustment bolt 98 between the head thereof and the opening 104 in theswitch housing portion 52 of the anchor member 40. The spring 106 servesto pull the head of the force adjustment bolt 98 downwardly, as shown inFIG. 7, thereby pulling the bolt housing 42 down against the surface ofthe switch housing portion 52. When however, the bolt 68 is projectedand force is applied to try to lift open the window sash 32, this upwardforce will tend to move the housing 42 up oft from the switch housingportion 52 against the action of the force responsive spring 106. Whenthis occurs, as stated above, the switch arm 62 will move upwardly thusactuating the switch 58. It will be appreciated that by turning theforce adjustment bolt 98 the distance between its head and the opening104 can be adjusted thereby controlling the tension of the spring 106and adjusting the amount of force necessary to actuate the switch 58.

As illustrated in FIG. 7, the plug 44 is biased toward its outerposition (with the bolt 68' fully retracted) by means of one or moreplug bias springs 110 which extend between the housing end wall 66 andthe plug 46 itself. The springs 110 are guided by means of support rods112 which extend inwardly from the wall 66 of the housing 42 toward theplug 46. When the plug 46 is pushed in- 'wardly to project the bolt 68,the rods 112 project into inner bores 114 provided within the plug 46itself.

The housing 42 is additionally provided with a latch bore 116 whichextends into the interior wall surface of the plug bore 44. The latchbore 116 is positioned to accommodate a latch lug 118 within the plug46. This latch lug 118 is biased outwardly by spring means (not shown),and is retracted by turning a proper key within the key cylinder 48.When the plug 44 is retracted as shown in FIG. 7 the latching lug 118 isheld in its upper or retracted position by the inner surfaces of theplug bore 44. When however, the lug 46 is pushed forwardly to projectits bolt 68 as illustrated in FIG. 8, the latching lug 118 comes intoalignment with the latching bore 116 and projects into the bore to holdthe plug 46 in its inner position against the action of the plug biassprings 110. 'Ihus the device will remain in its locked condition andcannot be taken out of its locked condition except by turning a key toretract the latching lug 118 out of the latching bore 116.

During operation of the above described arrangement no effect whateveris produced upon either the upper or lower sashes 38 and 32 when thelock switch device 30 is in its non-locking position. Thus either orboth sashes may be opened or closed at will. Locking of the sashes iseffected simply by exerting thumb or finger pressure on the plug 46 toproject the bolt 68 into the housing 70 in the lower sash 32. When thisoccurs, the additional locking bolt 74 projects into the housing 716 ofthe upper sash 38 thus locking the two sashes together and locking thelower sash 32 via the lock switch device 30 to the window frame 36.

At the same time, the device is automatically secured in its lockedcondition by virtue of the latching lug 118 which comes into alignmentwith the latching bore 116 of the bolt housing 42.

Should any attempt be made force open the lower sash 32, such forcewould be communicated via the bolt 68 against the housing 42, tending tomove it upwardly olf the anchor member I40 which is secured to thewindow frame 36. This upward force is resisted, to a certain degree, bythe force responsive spring 106. However, when the restraint offered bythe spring 106 is overcome, the housing 42 'will move upward slightlyolf from the switch housing portion of the anchor member 40 thusallowing the switch arm 62 to move up from the switch bottom 60 therebyactuating the electrical switch 58. The electrical switch 58 isconnected to external means (not shown) for actuating a remote alarm.

It will be appreciated the above described arrangement is easily mountedon window and window frame surfaces with the minimum of structuralchanges required for either. Moreover, in spite of the fact that thisarrangement is surface mounted, it will be appreciated that it isimpossible to remove or otherwise disable the lock or switch withoutcausing an alarm to be sounded. Thus, any attempt to dismantle the lockarrangement, as for example, by removing the bolt 98 which holds thebolt housing 42 to the anchor member 40, would result in actuation ofthe electrical switch 58 and sounding of an alarm.

FIGS. 9 through 18 illustrate a self contained window lock-alarm unitaccording to the present invention for mounting on windows and the likeand for producing a locally generated acoustical alarm Without need forexternal electrical power. As shown -in FIG. 9, there is provided alock-alarm unit depicted generally at 200 and mounted the top surface ofa lower 'window sash 202 in close positional relationship to a slide oredging member 204 of an upper window sash 206. The lock alarm unit 200includes an anchor plate 208, which is fastened to the lower sash 202,and an outer casing 210, which fits over the anchor plate 208. Towardone end of the Outer casing 210 there is provided a horizontallyextending plug bore 212 which houses a locking plug 214 similar to theplug 46 of the preceding embodiment. A11 acoustic alarm speaker 216 ismounted on top of the outer casing 210 for transmitting the locallygenerated alarm sounds. There are also provided a pair of tensionadjusting bolts 218 which may be turned down to adjust the amount ofprying force necessary to actuate the alarm.

As shown in FIG. 10, the plug 214 is provided with a locking bolt 220ywhich extends from one end thereof, and which projects, when the plug214 is pressed inwardly, into a bolt receiving recess 222 in the slidemember 204 of the upper window sash 206 thereby effectively locking theupper and lower sashes 206 and 202 together.

As shown in FIG. 1l, the tension bolts 218 extend down through the outercasing 210, and are threaded into the anchor plate 208. Force sensingsprings 224 surround the bolts 218 between their heads and lowersurfaces 226 of the outer casing 210. Thus, in order to lift the outercasing 210 olf from the anchor plate 208 it is necessary to compress theforce responsive springs 224. It will be appreciated that the amount offorce necessary to achieve this lifting action will depend upon thedegree to which the tension bolts 218 are turned down, for thisestablishes the amount of stress with which the springs 224 resists theupward movement of the outer casing 210.

As shown in FIGS. 11 and 12, the action of forcing either the upperwindow sash 206 downwardly or of forcing the lower window sash 202upwardly, will produce a reaction between the locking bolt 220 and therecess 222 into which it is engaged so as to effect a tipping action ofthe outer casing 210 of the lock-alarm assembly 200 with respect to theanchor plate 208. It will also be appreciated that when this tippingaction takes place, a latching surface 230, associated with the outercasing 210, becomes lifted up oil:` from a lug 232 associated with theanchor plate 208. When this occurs there will be provided a switchingaction for actuating the alarm. The mannery in -which this switchingaction is effected will be described more fully hereinafter.

As shown in FIG. 13 the outer casing 210 is basically of hollowconstruction and has mounted therein, just under the speaker 216, anelectrically powered alarm generator 234. This alarm generator may be anelectrical siren such as that described in co-pending applicationentitled Acoustical Alarm, Ser. No. 530,883 led Mar. l, 1966; or it maycomprise a conventional electrically operated buzzer. The alarmgenerator 234 receives positive potential via a wire 236 which isconnected to a grommet 238 in a battery clip 240. The battery clip 240is made of ber, plastic or other insulative material, and is constructedto contain therein one or more batteries 242, or correspondingelectrical power sources. The positive terminal of the battery 242 ismaintained in contact with a spring like contact element 244, and thisin turn is connected to the grommet 238 to complete the positiveconnection to the electrical alarm generator 234. The negative or groundconnection from the electrical alarm generator 234 is effected throughthe outer casing 210 which itself is of metal or other conductivematerial. As shown in FIG. 13, however, the negative end of the battery242 is held, by means of an insulative button 246 at the rear of thebattery clip 240, away from the outer casing 210. The entire batteryclip 240 is held in a forward position by the action of the lug 232,associated with the anchor member 208, upon the rear latching surface230 of the battery clip 240. At the same time spring bias means(described more fully hereinafter) act to urge the battery clip 240 in arearward direction.

When the outer casing 210 is forced upwardly by a prying or jimmyingaction on the window sashes 204 or 206, the outer casing 210 is liftedupwardly to a slight degree from the anchor plate 208 against the actionof the force responsive springs 224. This causes the rear surface 230 ofthe battery clip `240 to be raised up oliC from the lug 232 on theanchor plate 208. As a result, the biasing arrangement (to be described)causes the entire battery clip 240 to move rearwardly as illustrated inFIG. 14 thereby bringing the negative end of the battery into contactwith an internal shoulder 248 near the rear of the outer casing 210.This completes an electrical circuit between the battery 242 and thealarm generator 234 so as to cause the production of an acoustical alarmvia the speaker 216.

It will be noted that the lug 232 is mounted on a leaf spring 250 sothat when the forcing or jimmying action which causes the alarm to besounded is removed, the battery clip 240 will simply press down upon thelug 232 but will not be moved by the lug out of contact with theshoulder 248. Thus the alarm will continue to function until the batteryclip `240 is moved forwardly again so as to break the connection at theshoulder 248 and permit the lug 232 to move upwardly behind the rearsurface 230 of the battery clip 240.

The spring biasing arrangement which tends to move the battery clip 240in a rearward direction is illustrated in FIGS. 15 and 16. As showntherein the battery clip 242 is provided with laterally extending lugs250 which project outwardly from each side thereof. These lugs move backand forth with the battery clip 240 within longitudinal extendingrecesses 252 within the outer casing 210. A pair of guide rods 254extend along the recesses 252 and are secured to the outer casing 210 atthe forward end of these recesses and pass through openings (not shown)in the lugs 250 to assist in guiding these lugs in their longitudinalmovement. Coil bias springs 256 surround the guide rods 254 between thefront end of the recesses 252 and the lugs 250, and these springs urgethe lugs and the battery clip 240 in a rearward direction.

As pointed out above, the action of the plug 214 and the locking bolt220 to achieve locking is the same as in the embodiment of FIGS. 1-8. Inthe present embodiment, however, the plug 214 additionally provides areset function. This is achieved by the provision of a recess 260 alongone side of the plug 214 (FIGS. 13-16). This recess has a tapered camsurface 262 toward the bolt end thereof. Additionally, the rear end wall230 of the battery clip 240 tits into the recess 260 when the batteryclip 240 is moved by the bias springs 256 to a rearward position asshown in FIGS. 14 and 16. When the locking plug 214 is retracted,however, to an unlocked position as shown in FIG. l5 the cam surface 262of the recess 260 acts upon the rear wall 230 of the battery clip 240urging the battery clip 240 to a forwardmost position. When the batteryclip reaches its forwardmost position, then the lug 232 under theinuence of its leaf spring 249 will move upwardly to latch the batteryclip 240 into its forwardmost position. Thereafter the window sashes 202and 206 are locked together by pushing inwardly on the plug 214 to causethe bolt 220 to project into the bolt recess 222. When this occurs, theplug 214 moves to a position such that its recess 260 becomes alignedwith the latch wall 230 of the battery clip 240. Thus, when the outercasing 210 is raised, the battery clip 240 upon release from the lug 232will be enabled to move rearwardly under the influence of the biassprings 256 so that the rear of the battery 242 may contact the shoulder248 of the outer casing 21-0 to complete the circuit between the battery242 and the alarm generator 234 to sound an alarm.

The exploded view of FIG. 17 illustrates in 'greater detail the actualconstructional details of the outer casing 210 and the anchor plate 208.As illustrated in FIG. 17 there is provided an elongated leaf typespring member 264 which is secured at one end to the top of the anchorplate 208 and which normally extends upwardly toward the bottom of thebattery clip 240 so as to hold the battery clip 240 up into the outercasing 210.

Thus, when the outer casing 210 is moved upwardly the spring 264 willcause the battery clip 240 to move upwardly with the casing so that itwill be enabled to clear the lug 232.

Also as shown in FIG. 17, there are provided a pair of upwardlyprotruding bosses 266 on the anchor plate 208; and these bosses arethreaded to receive the tension bolts 218 which proceed through thecasing 210. The tension bolts 218 thus permit up and down movement ofthe outer casing 210 and at the same time provide a certain amount of-guidance to prevent lateral movement thereof. At the opposite end ofthe anchor plate 208 there are provided a pair of upstanding lugs 268which protrude up into guide openings 270 in the outer casing 210 toassist in this guiding action.

As shown in FIG. 17 the anchor plate 208 is secured by means of screws272 into the upper surface of the window sash 202. It will be noted thatwhen the outer casing 210 is in place on top of the anchor plate 208 themounting screws 272 are completely hidden from view and access may notbe had to these screws unless and until the outer casing 210 is removed.However, the outer casing 210 cannot be lifted up off the anchor plate208 without the battery case clip 240 clearing the retaining lug 232 andbeing urged rearwardly to make contact with the casing shoulder 248 toset 01T the alarm. Thus the device is intrinsically tamperproof.

As shown in FIG. 17, the outer casing 210 is provided with a slot 274which extends along across its lower surface at the bolt end thereof. Aguide screw 276 extends into the slot 274 and is threadedly engaged withthe plug 214. The guide screw 276 thus prevents the plug 214 fromrotating within the bore 212, and at the same time it limits thelongitudinal movements of the plug between its protracted or locked, andretracted or unlocked positions. There is additionally provided a latchbore 278 in the lower surface of the outer casing 210 and into which aspring biased latch element (not shown) from the plug 214 extends whenthe plug is in its protracted or locked position. This latch isretracted from the latch bore 278 by the operation of a key in a keycylinder 280 which extends longitudinally within the plug 214 as in thepreceding embodiment.

Turning now to FIG. 18 the various elements making up the self-containedacoustical alarm embodiment of the present invention can be seen inrelation to each other. It will be appreciated that the entire assemblyutilizes a relatively small number of parts and yet is compact andrugged and is essentially tamperproof. Moreover, the arrangement isinherently rugged and at the same time provides a pleasing appearance.

FIGS. 19-23 show an arrangement of the present in- Vention suitable foruse on casement or swing out type windows. As shown in FIG. 19, acasement type window 300 is arranged to swing out in the direction of anarrow A, away from a window frame 302. The window frame 302 includes alower sill 304 which runs along the bottom of the window 300. Alock-switch arrangement shown generally at 306 is mounted in conjunctionwith the window 300 and the frame and sill 302 and 304. The lock-switcharrangement 306 comprises a bolt casing 308 which is secured to theedging of the window 300, and a strike plate arrangement 310 which isrecessed into the sill 304. As shown in FIG. 19, when the Window 300 isclosed, the bolt casing 308 is positioned directly above strike platearrangement 310.

As shown in FIG. 20, the 4bolt casing 308 is formed with a verticallyextending bore 310 into which a lock plug 312 closely fits. The lockplug 312 may be depressed downwardly into the bore 310 to project a bolt(not shown) into a bolt opening 314 in the strike plate assembly 310.The strike plate assembly 310 itself is provided with a cylindricallower housing 316 which sets into an opening provided therefor in thewindow sill 304. As shown in FIG. 20, there is provided a flat flangeportion 318 on the top of the cylindrical housing 316, which rests flushwith the upper surface of the sill 304. The flange portion 318 isprovided with a plurality of mounting holes 320 through which screws orother fastening devices may be provided to secure the assembly 310 tothe window sill 304.

Turning now to FIG. 2l, it will be noted that the bolt casing 308 isprovided with a pair of counter-bored mounting holes 322 through whichmounting screws or bolts 324 pass for securing the housing 308 to theedging of the window 300. A pair of access holes 326 are arranged inalignment with the mounting holes 322 directly across the bore 310. Theaccess holes 322 permit the application of a screwdriver or other toolto secure the bolts 324 or other fastening devices in place. It will benoted in this connection that when the plug 312 is positioned within thebore 310, it covers the region between at least one of the access holes326 and its associated mounting hole 322. Thus, one may not remove thebolt housing 308 from the window 300 when the plug 312 is in place.

The plug 312 is provided with a bolt 328 which extendsfrom the lower endthereof out through a bolt opening 330 in the bottom of the bolt housing308 when the plu-g 312 is in its depressed position as shown in FIG. 2l.When the plug 312 is in its retracted position however, as shown in FIG.20, the bolt 328 is retracted entirely within the housing 308. There isprovided a lock cylinder 332 'which extends through the plug 312 andwhich is provided with the usual key slot opening 334 (shown in FIG. 20)for turning same within the plu-g 312. Rotation of the lock cylinder 332causes a latch lug 336 to be retracted into the side of the plug 312.The latch lug 336 is resiliently biased to a projecting condition asshown in FIG. 12. When the plug 312 is in its lowermost position asshown in FIG. 21, the latching lug 336 projects down into a recess 338provided in the bore 310. 'Ihis serves to hold the plug 312 in itslowermost or locking condition as shown in FIG. 21.

When the plug 312 is in its lowermost or locking position as shown inFIG. 21, the bolt 328 projects down into the opening 314 in the strikeplate assembly 310. This serves to secure the bolt housing 308 and,correspondingly the window 300, to the strike plate assembly 310,thereby locking the window 300 to the still 304.

The strike plate assembly 310, in addition to providing an anchorage forthe bolt 328, also serves to monitor any forces produced upon the window300 which tend to move the bolt in a direction toward opening of thewindow. To this end, there is provided a slide block 340 within thecylindrical housing 316 of the strike plate assembly 310. As shown inFIG. 22, the slide block 340 is movable in a horizontal direction backand forth within a channel 342 cut diametrically through a guide block344 which fits closely within the cylindrical housing 316. The slideblock 340 is provided with a bore 346 which is dimensioned to provideclose tting access to the bolt 328 when it is projected from the housing308.

The slide block 340 is guided for back and forth movement within thechannel 342 in the guide block 344. It will thus be seen that the slideblock bore 345 moves back and forth immediately vunder the opening 314in the strike plate assembly '310. The opening 314 itself is elongatedto permit the bolt 328 to move back and `forth a slight amount as thewindow 300 is forced in the direction of the arrow A (FIG. 19). Thismovement will urge the slide block 340y over a distance sufficient totraverse the clearance B (FIG. 20) between the edge of the bore 346 andthe slide block 340 and one end of the elongated slot 314 in the strikeplate assembly 310. This lmovement of the slide block 340 is resisted bymeans of a compression spring 350 positioned between the slide block andthe inner surface of the cylindrical housing 316.

It will be appreciated that the above described arrangement the window300 is capable of being forced toward an open position only by forcessufficient to overcome the resistance of the spring 350 when the lockassembly 306 is put in locking condition; and even when the force of thespring 350 is overcome, the window may be moved only through thedistance B whereupon the bolt 328 will come in contact with the end ofthe elongated slot 314 and will be thereby prevented from furthermovement.

As shown in FIG. 22, the slide block 340 is provided with an upstandinglug 351. This lug engages an arm 352 on an electrical switch 354 whichis mounted on the lower surface of the guide block 344. The lug 351moves back and forth within a slot 356 formed in the bottom of the guideblock 344.

Turning now to FIG. 23 it will be seen that the spring 350 urges theslide block 340 in a direction such that the lug 351 thereon urges theswitch arm 352 in a direction such that the switch arm presses against aswitch button 358 on the switch 354 itself. The switch arm 352 is ofresilient material such as spring steel and normally assumes a positionout and away from the button 358. The force of the spring 350 farexceeds the resilient biasing force on the switch arm 352 and thereforeholds it against the switch button 358. When, however, prying orjimmying forces are imposed upon the window 300 to a degree suicient toevercome the resistance of the spring 350, then the slide block 340 willmove outwardly against the action of the spring 350 and retract the lug351 from the switch arm 352. This movement permits the switch arm '352to move away from the button 358 thus actuating the switch 354.

As shown in FIG. 21, there are provided wires 360 leading from theelectrical switch 354 and these wires out through an opening 362 in thebottom of the cylindrical housing 316 to a remote alarm means forproviding actuation thereof in accordance with the actuation of theswitch 354.

It will be appreciated that the arrangement shown in FIGS. 19-23 isquite compact and simple in construction and yet provides substantialprotection and automatic signalling of any attempts to disable or removethe locking arrangement.

While the arrangements shown in FIGS. 19-23 are designed especially forconvenient and rapid mounting on window arrangements which have alreadybeen built, the principles of the present invention are also suitablefor use in conjunction with arrangements designed for use on custominstallation whereby window locks are specially built into the edging ofthe window themselves. Such an arrangement is shown in FIGS. 24 and 25.

In the arrangement of FIGS. 24 and 25 there is provided a easement orswinging type window 370 made up of glass pane portions 372 and edgingportions 374. The edging portions 374 are of hollow construction; andthey are provided with a latching handle 376 and key lock arrangement'378. The window 370 swings outwardly in the direction of an arrow C toopen out from a window frame 380. In order to latch the window 370 inits closed position, there are provided latching elements382 at thebottom and the top of the window in the region of the edging 374. Theselatching elements are retracted and projected by operation of the latchhandle 376; and when they are projected, the latching elements 382project into strike assemblies 384 and 386 at the bottom and top of thewindow frame 380 respectively to latch the window 370 in its closedposition as shown in FIG. 24. When the lock 378 is operated, the latchelements 382 become secured in their projected position so that thewindow is effectively locked.

Turning now to FIG. 25, it will be seen that the window edging 374includes front and rear channel members 388 and 390 which, whenassembled form a hollow passageway extending from the bottom to the topof the window. Guide blocks 392 are provided at the top and bottom ofthe edging 374. These guide blocks have bores formed therethrough topermit the latching elements 382 to project and retract from the window370. The latching elements 382 are secured to plates 394 near the centerof the edging 374 within the channel members 386 and 390. Each of theseplates are provided with a gear rack 396 which meshes with an operatinggear 398. The gear 398 is connected by means of a coupler -400 to thelatch knob 376 so as to be turned in place thereby. Turning of the latchknob 376 thus rotates the gear 398 causing one of the racks 396 to moveupwardly and the other to move downwardly thus retracting or projectingthe latch elements 382 together. When the latch elements are in theirprojected condition, an opening 402 in one of the plates 394 comes intoalignment with locking bolt element 404 operated by the lock 37 8. Whenthe lock is operated while latching elements 3-82 are in their projectedcondition, the bolt element 440 passes into the opening 402 thus tsecure the latching elements 3-82 in their projected or lockingcondition.

As can be seen in FIG. 25, the lower strike plate assembly is of thesame construction as the strike plate assembly 310 of the embodimentshown in FIGS. l9-23. Thus there is achieved a combination locking andalarm actuating arrangement which provides a maximum degree of securityin a custom built installation. It will of course be realized that theupper strike plate assembly 384 may likewise be constructed in themanner of the lower strike plate assembly 38'6 so as to insure that anyprying action either at the top or the bottom of the window 370 willresult in actuation of the switching arrangement to sound an alarm.

Having thus described my invention with particular reference to thepreferred forms thereof, it will be obvious to those skilled in the artto which the invention pertains, after understanding my invention, thatvarious changes and modifications may be made therein without departingfrom the spirit and scope of my invention, as delined by the claimsappended thereto.

What is claimed as new and desired to be secured by Letters Patent is:

1. A lock-switch assembly comprising a bolt housing having a boltmoveable therein between a iirst position lying wholly within saidhousing and a second position projecting out from said housing, ananchor member, means for securing said anchor member to the surface of aclosure member, said means being exposed on a given surface of saidanchor member, means mounting said bolt housing to said anchor member tocover its said given surface and said securing means, said mountingmeans including spring means arranged to permit limited relativemovement between said bolt housing and said anchor member in response toprying forces in excess of a given amount and a switch mounted andconnected between said anchor member and said housing to be operated bymovements of said bolt housing with respect to said anchor member.

2. A lock-switch assembly as in claim v1 wherein said switch ispositioned within a recess in said anchor member.

3. A lock-switch assembly as in claim 2 wherein said recess opens ontoan anchor member surface which becomes covered by the assembly of saidclosure member surface, said anchor member and said bolt housing.

4. A lock-switch assembly as in claim 1 wherein said switch includes aswitcharm which is resiliently biased up against said bolt housing inassembly.

5. A lock-switch assembly as in claim 1 wherein said bolt housing is asolid block of metal of generally rectangular configuration and whereinsaid anchor member is also a solid block of metal formed with a cornerrecess for accommodating said bolt housing in ilush mountedrelationship.

6. A lock-switch assembly as in claim 1 wherein said anchor member andsaid bolt housing are loosely bolted together with a bolt extendingloosely through the one and threaded into the other and a coil springsurrounding said bolt and extending between its head and said one.

7. A lock-alarm device comprising an anchor plate constructed to besecured to a closure member, securing means exposed on a given surfaceof said anchor plate for securing same to said closure member, an outercasing, means mounting said outer casing to said anchor plate to coversaid given surface and said securing means in a manner allowing limitedmovement of said casing up from said plate, said mounting meansincluding spring means arranged to resist such movement of said casing,a lock bolt mounted in said casing to move between retracted andprojected positions, electrical switching means positioned inside saidcasing and spring biased to an operation condition, and latching meanswithin said casing for holding said switching means in inoperativecondition against said spring bias, said latching means being releasableupon upward movement of said casing with respect to said anchor plate.

8. A lock-alarm device comprising an anchor plate constructed to besecured to a closure member, securing means exposed on a given surfaceof said anchor plate for securing same to said closure member, and outercasing, means mounting said outer casing to said anchor plate to coversaid given surface and said securing means in a manner allowing limitedmovement of said casing with respect to said plate, said mounting meansincluding spring means arranged to resist movement of said casing awayfrom said plate, a locking bolt mounted in said casing to move betweenretracted and projected positions, electrical switching means carriedlby said casing, resilient biasing means carried by said casing `andurging said switch means to an operative condition and latching meansoperating between said switch means and said anchor plate to hold saidswitch means against the action of said resilient biasing means whilesaid outer casing is down against said anchor plate and to release saidswitch means when said casing undergoes said limited movement.

9. A lock-alarm device comprising an anchor plate constructed to besecured to a closure member, an outer ca'sing, means mounting said outercasing to said anchor plate in a manner allowing limited movement ofsaid casing with respect to said plate, said mounting means includingspring means arranged to resist movement of said casing away from saidplate, a locking bolt mounted in said casing to move between retractedand projected positions, electrical switching means carried by saidcasing, resilient biasing means carried by said casing and urging saidswitch means to an operative condition and latching means operatingbetween said switch means and said anchor plate to hold said switchmeans against the action of said resilient biasing means while saidouter casing is down against said anchor plate and to release saidswitch means when said casing undergoes said limited movement, saidIbolt being provided with cam means en\ gageable with said switch meansto retract said switch means against said resilient biasing means to aninoperative condition and to effect reengagernent ot' said latchingmeans up retraction of said bolt.

10. A lock-alarm device comprising an anchor plate constructed to besecured to a closure member, an outer casing, means mounting said outercasing to said anchor plate in a manner allowing limited movement ofsaid casing with respect to said plate, said mounting means includingspring means arranged to resist movement of said casing away from saidplate, a locking bolt mounted in said casing to move between retractedand projected positions, electrical switching means carried by saidcasing, resilient biasing means carried by said casing and urging saidswitch means to an operative condition and latching means operatingbetween said switch means and said anchor plate to hold said switchmeans against the action of said resilient biasing means while saidouter casing is down against said anchor plate and to release saidswitch means when said casing undergoes said limited movement, saidswitching means comprising a switch member mounted for limitedreciprocal movement within said outer casing, said switching meansfurther including a iirst switch contact carried by said member and asecond switch contact carrier by said casing, said switch contacts beingarranged to touch upon movement of said member `by its resilient bias.

11. A lock-alarm device as in claim 10 wherein said switch member is abattery clip.

12. A lock-alarm device as in claim 11 wherein said outer casingincludes an electrical alarm connected in circuit with said battery clipand said switching means.

13. A lock-alarm device as in claim 1 wherein said latching meanscomprises a lug extending up from said anchor plate to engage saidbattery clip.

14. A lock-alarm device as in claim 13 wherein said lug is spring biasedto an upward position and is movable downwardly under pressure from saidbattery clip after it has passed over said lug.

15. A lock-alarm device as in claim 9 wherein said bolt is mounted on aplug which ts closely in a bore through said outer casing and whereinsaid plug is formed with a cam surface which engages said battery clipto urge it against and resilient bias upon retractive movement of saidbolt.

16. A lock-alarm device as in claim 1S wherein said bolt and plug arespring biased to a retracted position.

17. A lock-alarm device as in claim 16 and further including keyreleasable latching means to hold said bolt projected against the actionof its spring bias.

References Cited UNITED STATES PATENTS 2,756,300 7/ 1956 Thiberville20G-61.67

ROBERT K. SCHAEF'ER, Primary Examiner H. I. HOHAUSER, Assistant ExaminerU.S. C1. XJR.

ZOO-61.81; 340-274; --90

